| 摘要 |
PURPOSE:To improve draw-down resistance in large-size blow molding, by mixing high-density polyethylene with crystalline polyethylene and an ethylene/alpha- olefin copolymer rubber. CONSTITUTION:50-93wt% high-density polyethylene of a melt flow index <=1.0g/ 10min is mixed with 5-50wt% crystalline polypropylene of a melt flow index <=1.0g/10min, 2-30wt% ethylene/alpha-olefin copolymer, and 0-30wt% filler. Desirable ethylene/alpha-olefin copolymer rubbers include an ethylene/propylene copolymer rubber (EPR) or a terpolymer rubber (EPDM) prepared by copolymerizing an ethylenpropylene system with a nonconjugated diene as the third component. |
